Grease-cup



T. E. ADKINS.

GREASE CUP.

APPLlcATIoN FILED APR. 22, 1920.

1,373,991 Patented Apr. 5, 1921,

FATENT YQiffill.

THOMAS E. AIDKINS, F CANTON, OHIO.

GREASE-our.

' invasor.

Y use on shackle bolts or other bearing parts requiring continuous lubrication; and the object of the improvement is to produce a 'cup through which the cavity of the bolt or other Areceptacle may be readily nlled from a grease gun, and vwhich when filledv will automatically retain the grease in the receptacle and continue to force or feed the saine therein.

Then the hollow of a shacklef'bolt' or other grease receptacle is filled with grease'.v

yand aV portion of the same is used upon the bearing, difficulty is experienced from a failure of the grease in the reservoir to follow the used portion to the bearing surface; and this difficulty is overcome by providing a valve in the grease cap composed of a spring controlled extensible capsule, which will be contracted inlen-gth when the receptacle is lled and will then extend to force or feed the `body of greaseinto the receptacle. Y

The invention may be embodied ina preferred forni thereof illustrated in theV accompanying drawings forming part hereof,

in which- Figure 1j is a longitudinal section of aI shackle bolt showing a grease cup thereon and the socket of va feed tube connected*4 therewith; Y

Fig. 2, a longitudinal ysection of the grease cup and'feed socket;

Fig. 3, a longitudinal section of the grease v cup filled with grease;

Fig. 4, a section of the cup -on line L -4, Fig. 2;

Fig. 5, a vsection of the cup jon line 5 5, Fig. 2; and

Fig. 6, a fragmentary end elevation of 'a A shackle bolt showing an end view of the grease cup thereon. v

Similar numerals refer to similar parts throughout 'the' drawings. A

kThe grease cup 1 is cylindrical in general forml with a tubular screw shank 2 on its inner end and a nut flange 3 forming a shoulder for screwingagainst the end of the shackle bolt 4, so that the hollow 5 of the Specification of Letterslate'nt.

application inea April 22, i920. serial no. 375,74i.

'to pass from Ithe duct 11 to;v thev grooves'f12l rateiite'u Apr. 5,1921;

stem will register with the hollow 'of the y bolt.

The wall o f the cup Vl is originally*ina-de` trulycylindrical for the entrance kof the capsule, with itsriinportion 7 taperedV externally so as to be readily deflected inward to forni a valve seat for .the outerend of the capsule, as shown in Figs. 2 and '3. i

-lhe capsuleis composed of two similar cylindric cupsS and 8 having their-'open ends telescoped one within the other and"` their closed ends preferably rounded in semi-spherical form. The wall of the outer capsule cup 8 slidably fits neatly within the wall' of the grease cup and the peripheral portion of its semi-spherical Vend forms valve seating in the contractedV rim portion,-

Vof the cup; while the wall ofthe i'nnercup#V 8 slidably its'neatly within the wall of the outer cup and its lsemi-spherical end nor- Y inally seats against the annular bearing 9L of the stein in the; f

formed by the hollow 5 bottoni'of the cup.

Corresponding longitudinal corrugations 10 and 10 are formed in the cylindrical walls of the cups and these corrugations i forni ducts 11 along the walls'of thecup j for the passage of-grease when the round end of the outer cup is forced inward lfrom its .seat in the rim 7 of the cup; and a plu-.J rality of grooves 12 are provided in thefbotf` tom of Vthe cup for the passage of grease i into the hollow 5 of the stem when the inner cup is seated on the annular-bearing?) `'in the bottom of the cup; it being understoodvv that the annular channel 13 aroundthe wallA of the'inner cup, formed by the tliickness'off the wallof the outer cup, permits the grease.

when the saine are not-in aline'ment. v A plurality of external annular integral flanges 14' are provided on the Vgrease cup with intervening notches 15, whichiiotches are adapted, to pass theintegral lugs 16 pro; vided on theY inside of the feed socket 17 which is connected with the end of the feed tube 18 leading from a grease gun, vnot shown, or other source of forced supply; and the inner sides of the flanges 14 are preferably beveled as shown in Fig. f1, Vso that when thevlugs 16 have passed through the notches 15 to the inner side of theV ico anges, a turning of the socket upon the socket and the cup.

flanges on the grease cup, prevents a loosening of these elementsV of the bayonet joint by the Vibrations of the machine which carries the cup or by other eXigencies of its use.

The annular packing 19 is proVidedin-the bottom of the feed socket 17, whichpaclo' ing is Vshaped to tit around the tapered end of the 'grease cup Vand to extend along the sides thereof to the flanges la when entered therein; which packing may be secured in the socket by means of liquid glass or other suitable cement,'and constitutes a bearingV or of the grease cup so that the closedv end of the outer capsule cup may protrude freely from the end oit the cup when the parts'are in normal position, as shown in Fig. 2. The two cups of the capsule are held extended againstltheir respective seats, by means ot the coiled compressionv spring 22. located f within the capsule; which is the position of the parts Jfor filling the a O'rease gun or the like. Y Y

j y these Ymeans it isV evidentl that when grease is supplied under pressure through the hollow 20 1n the ,tubular stem 2l. of the grease receptacle by feed socket, the same rst presses the outer capsule'cup 8 inward from its seat in the rim 7 of the cup, thus permitting grease to enter around the capsule cups and to tind its way along the ducts /ll formed by the corrugations therein, and thence through 'the grooves 12 into the hollow 5 or" the stem oi? the cup, and on intothe hollow 6 'ofthe shackle boltor other receptacle for-the lubricant. Y y v `While the receptacle is "being tilled the spherical end of the inner capsule cup bears against the annuular seat 9 in the-bottoni' ot the grease cup, but when the hollow oit the shackle bolt and the stem of the grease cup are entirely lled the'pressure of the grease j upon the ends `of both the capsule cups causes the saine to telescope, one within the other; whereupon the feed socket is dis connected from the grease cup, and upon being withdrawn therefrom the back pressure or suction draws the connected capsule outward against the seat formed by the rim of the cup as shown in Fig. 3, and the suction likewise operating between the packing 19 and the wall ofthe cup, wipes the free vgrease from the end of the cup.

I claim Y l. A grease-cup having a valve seat at its rim and a supporting seat in its bottom, and an extensible capsule comprising two similar telescoping cups with valve forming ends Ycapsule cups against the seats, therebeing longitudinal'corrugations in the walls of the capsule forming ductsV for the passage of grease along the wall of the grease cup.

3. fi. grease cup having a Valveseat in its `rim and a supporting' seat in its bottom, and

an extensible capsule comprising two similar telescoping cups with valve forming ends and a compression spring within the capsule normally holding the ends of the capsule cups against the seats, there beingvducts for the passage of grease along the walls of the grease cup, and grooves for the passagelot' grease through the bottom seat thereof.

4. The combination of a grease cup and a feed socket with iianges on the one and' lugs on the other forming abayonet joint,

and a resilient packing in the socket extending around the sides and end portion oit the grease cup vand forming an air tight closure when clamped by the bayonet joint.

THOMAS n. Annina 

